APPENDIX G - TowerFeed Selftest

TowerFeed Selftest Feature

The TowerFeed selftest feature allows testing the TowerFeed unit independently from any printer and computer. With this test you can the paper-feeding behavior of the unit (horizontal position, skew, jam).

Note:

To perform a TowerFeed selftest with the printer on top of it, open the right side cover of the printer to access the media being fed from TowerFeed through the PPCA (Paper Path Connection Assembly).

To enter the TowerFeed selftest mode, proceed as follows

∙Power-off TowerFeed.

∙Open the printer's right side cover.

∙Open all TowerFeed Trays (approx. 5 cm / 2" is sufficient).

∙Power-on TowerFeed.

∙Wait for the following actions to be completed:

∙activation of the solenoid (clicking) in each module

∙spinning of the motor (approx. 5 sec)

∙a short beep (TowerFeed Reset beep)

∙Close the top-most TowerFeed tray. After a few seconds a sheet will be fed from this tray. You now can mark on the PPCA the position of the left edge of the sheet (reference for horizontal paper position).

∙Pull out the sheet from its waiting position. TowerFeed will automatically feed a next sheet. You now can compare the (moving) position of the left edge of the next sheet. If it moves up straight in the same position, this is ok. In case the left edge position would be different, or moving from left to right (or vice-versa), this might indicate a problem in either the tray, the unit (module) or the paper loading.*

∙To test the next lower tray, close that tray before removing the sheet from its waiting position. Now remove the waiting sheet and TowerFeed will feed a sheet from that next lower tray. (TowerFeed will always feed the next sheet from its lowest closed tray.)

To revert to normal operation, open the top-most TowerFeed tray, remove the waiting sheet and power-off TowerFeed. Close the right side cover and power on TowerFeed again with at least one tray closed. TowerFeed will respond with spinning the motor and a short 'Reset' beep. Now it is ready again in its normal operating mode.

*In case error conditions are showing up which are depending on a specific TowerFeed tray, you can swap trays to find out whether a problem exists with the tray itself or whether a specific module is the cause.

IU 675 / 0150

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TowerFeedTM for the HP LaserJet 9000